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A new cultivar of lilac (Syringa vulgaris) selected in the Kórnik Arboretum, Poland, is described. It is very easy to recognize by its pink peculiar flowers, whose petals are strongly tucked down. The shrub is healthy and blooms profusely every year.
The history of taxonomy and problems with identification of two very similar and closely related dogwoods Cornus alba and C. sericea are discussed. They were described by Linnaeus on the basis of flowering cultivated specimens of unknown origin. When characterizing their fruits, Linnaeus got the information from the older, “pre-Linnean”, literature and wrote that they were white in C. alba (Linné...
In 1988 a new cultivar of park rose was described as Rosa ‘Poznań’, however, the above name was used in 1966 for a large-flowered garden rose, which probably disappeared from cultivation. Several years ago the new name Rosa ‘Poznańska’ was proposed in the electronic trade catalogue to replace the later homonymous epithet, but it was at variance with the rules of International Code of Nomenclature...
The indumentum of P. alba, P. tremula and their hybrid (P. ×canescens) is discussed in detail and illustrated by scanning electron microscope and light microscope micrographs. Special attention is given to the hairiness of stems and leaves and to the diagnostic value of hairiness in distinguishing the grey poplar from its parent species. Presence or lack of hairs on leaves and stems, their density...
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